泉

coin (esp. an east Asian coin, many of which have a hole in the center)

Daijisen (Japanese dictionary published by Shogakukan)

salt (from a mineral spring)

springs and rocks

chalybeate spring; ferruginous spring; iron spring; hot spring with high iron content

garden pond

shinkansen pear; hybrid nashi developed in Tottori prefecture

carbonated spring; soda spring

hades; nether regions

hot spring guest; onsen visitor

bubbling spring; gushing spring; fountain

(water) well

arbor facing a spring (arbour)

Work of art, literature, music, etc. name

Gensen (Japanese dictionary; publ. 1921-29)

reclaimed paper

saline spring

Physiology

soft spot (in the skull of an infant); fontanelle; fontanel

gates of Hades; entrance to the underworld

bathing in a hot spring

waterfall

drinking spring water; taking the waters; onsen water used for medical treatment

simple hot spring (containing less than one thousand ppm of dissolved minerals)

numismatics

a spring that gushes forth from a valley

thermal spring source; onsen source